When does the 72-hour countdown for PCR tests start for travel to Thailand: from swab or results?

The conversation revolves around the validity of PCR test results for travelers going to Thailand. A user highlights differing rules between countries: in Germany, the 72-hour countdown starts when the swab is taken, while in the UK, it starts from the time the test results are received. Several commenters weigh in, confirming their understanding that many countries—including those related to the Thai embassy—often consider the result time instead. There's an ongoing debate and confusion about which timing applies to entering Thailand.